By-12 Core-To-Edge Fabric - HP StorageWorks 64 - SAN Director Switch Planning Manual

Subject to large fabric design constraints, core-to-edge fabrics are easy to scale
through the addition of core elements.
topology with four core directors and twelve edge directors and switches
(4-by-12 topology).
Devices
Figure 40: 4-by-12 Core-to-Edge fabric
A core-to-edge topology offers any-to-any device connectivity, and evenly
distributes traffic bandwidth throughout the fabric. The topology provides the
most flexible architecture to address fabric performance, traffic locality, data
integrity, connectivity, and scalability requirements.
SAN High Availability Planning Guide
TM
PWR
ERR
Tier 1 Core
Directors
TM
PWR ERR
Interswitch Link
Fabric Connection
Planning Considerations for Fibre Channel Topologies
Figure 40 illustrates a core-to-edge fabric
Tier 3 Devices
31 29
27 25
23 21 TM
19 17 15
30 28 13 11
26 24 9 7
22 20 5 3
18 16 1
14 12 10 PWR
8 6 ERR
4 2
0
31 29
27 25 TM
23 21 19
17 15
30 28 13 11
26 24 9 7
22 20 5 3 1
18 16 14
12 10 ERR PWR
8 6
4 2 0
Tier 3 Devices
Switches
TM
PWR
ERR
Core
Tier 1
Directors
Devices
Edge
Switches
31 29
27 25 TM
23 21 19
17 15
30 28 13 11
26 24 9 7
22 20 5 3 1
18 16 14
12 10 ERR PWR
8 6
4 2 0
Edge
95